(Irish: caifé Gaelach) is a cocktail consisting of hot coffee, Irish whiskey, and sugar (some recipes specify that brown sugar should be used[1]), stirred, and topped with thick cream. The coffee is drunk through the cream. The original recipe explicitly uses cream that has not been whipped, although drinks made with whipped cream are often sold as "Irish coffee". -Wikipedia
Happy National Irish Coffee Day! Recipe here: http://www.giglig.com/food/drinks/how-to-make-irish-coffee